恐龍卡第 1316 張，共 2 027 張

Opisthocoelicaudia

名字的意思： “posterior cavity tail”1

吃：植物長脖子恐龍白堊紀晚期

Opisthocoelicaudia was a big, long-necked plant eater that lived in the Late Cretaceous. It had a barrel-shaped body and four thick legs, like an elephant. Scientists found a nearly complete skeleton without the head and neck, so they know a lot about its body.1

生存年代

72 到 66 百萬年前4

白堊紀晚期

化石發現地

Gobi Desert, Mongolia1 4

長度

11.4 到 13 m (37 到 43 ft)1

體重

8.4 公噸到 25.4 公噸 (18,500 到 56,000 lb)1

高度

2.46 m (8.1 ft)1

最高速度

時速約 13 公里（8 英里）

跑步, 估計值

牠生活在什麼時候？

三疊紀

侏羅紀

白堊紀

2 億 5200 萬年前20114566，小行星撞地球

牠有多大？

牠有多長？

牠有多高？

牠有多重？

跟 4 頭大象一樣重

跟 3 台汽車排成一排一樣長跟 72 根香蕉頭尾相接一樣長跟 17 台汽車一樣重跟 5100 顆西瓜一樣重跟 32 整班小學生一樣重跟 56 隻北極熊一樣重能在 28 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Opisthocoelicaudia 跟「你」比起來有多大？

只是在你的瀏覽器裡算算數學。什麼都不會被儲存或傳送出去。

牠有多快？

走路的人 時速約 5 公里 (3 mph)

騎腳踏車的小朋友 時速約 12 公里 (7 mph)

Opisthocoelicaudia 時速約 13 公里 (8 mph)

一匹飛奔的馬 時速約 65 公里 (40 mph)

一隻獵豹 時速約 100 公里 (62 mph)

酷東西

趣味知識

Its tail vertebrae were shaped like ball-and-socket joints, which is unusual and gives it the name 'posterior cavity tail'.1

The skeleton had tooth marks from big meat-eating dinosaurs, which probably ate the carcass and carried away the head and neck.1

It could probably rear up on its hind legs to reach higher food, because its tail was strong and could act like a tripod.1 2

Its back vertebrae had split spines, creating a double row of bumps along its spine, a feature also seen in Diplodocus.1

It had six hip vertebrae, one more than most sauropods, which made its hips extra strong.1

The neck was about 5 meters (16 feet) long, which is medium for a sauropod.1

Opisthocoelicaudia 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Opisthocoelicaudia 可能的樣子。這只是猜測：真正的動物可能長得不一樣，也沒有人知道牠真正的顏色。

你們都在問

關於 Opisthocoelicaudia 最常被問的問題

?How big was Opisthocoelicaudia?

It was a relatively small sauropod, measuring about 11.4 to 13 metres (37 to 43 feet) long. Its body mass has been estimated at between 8.4 and 25.4 tonnes in different studies.1

?What did Opisthocoelicaudia eat?

Like other sauropods, it was a herbivore that ate plants. It probably fed on a variety of vegetation in its floodplain and riverine environment.3

?When did Opisthocoelicaudia live?

It lived during the Late Cretaceous Period, specifically in the ?Upper Campanian or Lower Maastrichtian, about 72 to 66 million years ago.1 2

?Where was Opisthocoelicaudia found?

Its fossils were discovered in the Gobi Desert of Mongolia, in the Nemegt Formation. The type specimen was found at Altan Uul in Ömnögovi Province.1

?Could Opisthocoelicaudia rear up on its hind legs?

Yes, scientists think it could rear up on its hind legs to reach higher food. Its strong tail could act like a tripod to support its weight.1

?Is Opisthocoelicaudia a dinosaur?

Yes, it is a sauropod dinosaur. It belongs to the group Titanosauria and lived during the Late Cretaceous.1

迷思破解王

迷思： Some people think Opisthocoelicaudia was a kind of camarasaur, but scientists now know it was a titanosaur.

真相： It was first classified as a camarasaurid, but later studies placed it in Titanosauria, a group of sauropods.1

給恐龍專家

學名: Opisthocoelicaudia
命名者: Borsuk-Bialynicka 19774
類群: 長脖子恐龍
科 / 演化支: Saltasauridae4
分類: Sauropodomorpha > Sauropoda > Titanosauria > Macronaria4
岩石的年代: 72 到 66 百萬年 (Maastrichtian)4
岩層: Nemegt4
國家: 蒙古4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: It was discovered in 1965 by a Polish-Mongolian expedition in the Gobi Desert. Polish paleontologist Maria Magdalena Borsuk-Białynicka named it in 1977.1 2
仍有爭議: Scientists debate whether Opisthocoelicaudia and Nemegtosaurus are actually the same species, because only the skull of Nemegtosaurus is known and Opisthocoelicaudia lacks a skull.1